S-96640A264 4-40 x 7/16" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
- High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
- Precise Class 2A thread fit guarantees smooth installation and secure fastening in coarse UNC threading
- Undercut flat head design provides a flush, professional finish that prevents snagging and improves aesthetics
- 82° countersink angle allows for seamless integration into tapered holes, reducing stress concentration
- Full threading and Phillips drive enable quick, efficient assembly with standard tools
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures quality, safety, and environmental standards are met
Professional Applications & Engineering Value
These 4-40 UNC flat head screws are engineered to address critical challenges in industrial assembly, such as corrosion, vibration loosening, and high-stress applications. The Black-Oxide 18-8 Stainless Steel construction provides superior resistance to rust and chemical exposure, making them suitable for outdoor equipment, marine hardware, and electronic enclosures. The undercut flat head and 82° countersink angle ensure a flush mount, eliminating protrusions that could interfere with moving parts or compromise safety. With a coarse thread spacing and Class 2A fit, these screws offer quick installation and reliable holding power in materials like metal, plastic, and wood, reducing assembly time and maintenance costs in manufacturing, automotive, and machinery sectors.
Specification Summary & Compliance
These screws feature a 4-40 UNC coarse thread with Class 2A fit for precise dimensional accuracy, ensuring compatibility with standard nuts and tapped holes. Manufactured in accordance with ASME B18.6.3 specifications, they guarantee consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and use in global markets.
